Surgery – Truss – Pad
Patent
1989-04-12
1992-03-03
Kamm, William E.
Surgery
Truss
Pad
128704, 36441306, A61B 5402
Patent
active
050923404
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an apparatus for measuring a signal from an organism or a living body for a predetermined period of time, and in particular, to a living body signal measuring apparatus for analyzing a signal from an organism in a realtime fashion.
BACKGROUND ART
In the field of medical treatment, a clinical examination measuring, for example, an electrocardiogram and a blood pressure measurement conducted as a daily job.
These examinations are ordinarily effected in quite a limited period of time in medical care institution such as a clinic or a hospital under control of a medical doctor or an examiner or inspector of an clinical check. However, there exist diseases which cannot be detected in the examination conducted in such a limited period of time.
For example, in a case of a temporary disorder of the heart or an arrhythmia, there does not necessarily appear an abnormal waveform in the electrocardiogram. Since an interval between appearances of such an abnormal waveform is great in many cases, the probability of the detection of such a disorder of the heart in a short period of time is decreased; in consequence, it is difficult in many cases to conduct a determinant diagnosis through an examination conducted requires a short period of time.
In this situation, for the detection of such diseases described above, there has been devised a method for measuring an electrocardiogram for a long period of time. According to this method, there is attained a long-term electrocardiogram or so-called Holter electrocardiogram such that for an entire day or 24 hours in the daily life, a portable electrocardiograph is kept attached on a portion of the body of a person as a subject so as to collect and to record electrocardiographic waveforms on a magnetic tape. The magnetic tape is thereafter read by use of a magnetic tape playback apparatus so as to reproduce the electrocardiographic waveforms, which are observed by an inspector such as a medical doctor to detect an abnormality, thereby conducting a diagnosis of disease such as a fugitive affection of the heart.
The electrocardiographic waveforms recorded on a magnetic tape are reproduced at a high speed due to the great volume thereof. Consequently, the inspector, for example, a medical doctor is required to conduct the diagnosis by visually checking such a great amount of electrocardiographic waveforms reproduced at a high speed, which imposes a hard load on the inspector.
As described above, in order to detect the arrhythmia which is a transistory disease and which appears at quite a rare occasion, the electrocardiographic waveforms collected in 24 hours are entirely reproduced so that analyzing the waveforms requires a long period of time, which requires many unnecessary jobs and which decreases the efficiency of the overall examination.
In order to eliminate the irrationality above, there has been adopted a method in which a magnetic tape containing a great volume of recorded waveforms is reproduced at a high speed (for example, at a speed which is 60 or 120 times the ordinary playback speed) such that the waveforms are automatically analyzed according to a predetermined method by the apparatus so as to display only the portions thereof judged to be abnormal as a result of the analysis, thereby enabling an inspector to examine the abnormal portions. However, since the magnetic tape undergoes a high-speed playback operation and data items of the electrocardiographic waveforms are inputted to the objective apparatus at a high speed, when it is desired to analyze the waveforms by use of, for example, a microcomputer, there cannot be afforded a sufficient time for the analysis, namely, it is difficult at the present stage of the technology to increase the accuracy of the analysis.
In order to overcome such a difficulty, there has been recently employed a method in which while the electrocardiographic waveforms are being gathered for a long period of time, an analysis of the waveforms are automatically achieved at the same time, n
REFERENCES:
patent: 3903874 (1975-09-01), Shakespeare
J. Fraden et al.: "QRS wave detection", Medical & Biological Eng & Comp., vol. 18, No. 2, Mar. 1980, pp. 125-132.
J. Qrum: "Der Cardioscatterhistograph-ein Gerat zur kontinuierlichen Anzeige quasiperiodischer Bio-Signale", Biomedizinische Technik, vol. 20, No. 5, Oct. 1975, pp. 192-198.
Supplemental European Search Report, The Hague, 12-01-89.
Fujii Tadashi
Go Takafumi
Hirano Toshinori
Yamaguchi Keiji
Getzow Scott M.
Kamm William E.
Terumo Kabushiki Kaisha
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